Screening of selected marine algae from the coastal Tamil Nadu, South India for antibacterial activity

Rosaline, Xavier Devanya; Sakthivelkumar, Shanmugavel; Janarthanan, Sundaram

doi:10.1016/s2221-1691(12)60145-2

Cited by 33 publications

(15 citation statements)

References 41 publications

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“…Systematical evaluation and optimization of the solvent is necessary for accurate and reproducible preparation of extracts. Several studies aimed at selecting the best solvent, which was usually one of the following: water, methanol, ethanol, acetone, ethyl acetate, dichloromethane, chloroform, diethyl ether and hexane [ 58 , 68 , 78 , 79 , 80 , 81 ]. Different authors have compared the different families of seaweed regarding antibacterial activity [ 6 , 69 , 82 , 83 , 84 ].…”

Section: Production Of Antimicrobials From Seaweedmentioning

confidence: 99%

Antimicrobial Action of Compounds from Marine Seaweed

2016

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Seaweed produces metabolites aiding in the protection against different environmental stresses. These compounds show antiviral, antiprotozoal, antifungal, and antibacterial properties. Macroalgae can be cultured in high volumes and would represent an attractive source of potential compounds useful for unconventional drugs able to control new diseases or multiresistant strains of pathogenic microorganisms. The substances isolated from green, brown and red algae showing potent antimicrobial activity belong to polysaccharides, fatty acids, phlorotannins, pigments, lectins, alkaloids, terpenoids and halogenated compounds. This review presents the major compounds found in macroalga showing antimicrobial activities and their most promising applications.

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Section: Production Of Antimicrobials From Seaweedmentioning

confidence: 99%

Antimicrobial Action of Compounds from Marine Seaweed

2016

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“…Similar results were obtained by Hellio et al 22 , and their extracts from E. intestinalis showed strong activity against Grampositive bacteria such as B. cereus and S. aureus with an MIC value of 96 µg/ml. In addition, Rosaline et al 31 reported that the green alga Chaetomorpha linum extracted by maceration with acetone showed the highest activity against MRSA with an MIC value of 2.5 mg/ml, while the ethanol and hexane extracts of C. linum exhibited MIC values of 5.0 mg/ml.…”

Section: Determination Of the Antimicrobial Activitymentioning

confidence: 99%

Antibacterial and antioxidant activities of differential solvent extractions from the green seaweed Ulva intestinalis

Srikong¹,

Bovornreungroj²,

Mittraparp‐arthorn³

et al. 2017

ScienceAsia

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ABSTRACT:The green algae (Enteromorpha spp.) is widely distributed in the southern coast of Thailand. Antibacterial, total phenolic, and antioxidant activities of crude extracts from Ulva intestinalis (E. intestinalis) with differential solvent extractions were investigated. Alga extracts were prepared by maceration with methanol, ethanol, dichloromethane, and hexane. Only the hexane extract had significant antibacterial activities for Gram-positive bacteria but not Gram-negative bacteria. The lowest minimal inhibitory concentrations of the hexane extract against Bacillus cereus TISTR 687, Staphylococcus aureus ATCC 29213, and methicillin-resistant Staphylococcus aureus 001 R (MRSA) were 256 µg/ml. Pore formation was observed on the cell surface of B. cereus treated with the hexane extract. Among these extracts, the highest inhibition radical scavenging effects on 2,2-diphenyl-2-picrylhydrazyl (DPPH) and 2,2 -azinobis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) activities were observed in the dichloromethane extract with IC 50 = 0.92 mg/ml and 1.50 mg/ml, respectively. The highest phenolic content index was observed with the dichloromethane extract as 197 ± 16 mg gallic acid equivalents/g extract and was significantly higher than those of other extracts (p < 0.05). The results indicated that this edible seaweed possesses bioactive compounds that could be further explored for future applications in medicine, dietary supplements, cosmetics, and food industries.

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“…Crude extracts were obtained using different solvents according to the method described by Rosaline et al (2012) with the following modifications: the powdered samples were soaked with hexane (1:3 w/v) at 21 C for 48 h and filtered through Whatman Õ GF/C filter paper under vacuum; the filtrate was concentrated under negative pressure at 50 C using a rotary vacuum evaporator (Yamato RE601 Scientific Co., LTd. Tokyo, Japan), and finally evaporated to dryness under N 2 stream. The procedure was repeated sequentially using acetone and methanol in a similar manner to cold percolation method.…”

Section: Seaweed Extractsmentioning

confidence: 99%

Antioxidant, antimutagenic and antiproliferative activities in selected seaweed species from Sinaloa, Mexico

Osuna-Ruíz

López-Saiz

Burgos‐Hernández

et al. 2016

Pharmaceutical Biology

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Context Seaweeds from the Mexican Pacific Ocean have not been evaluated as a source of chemoprotectants. Objective The objective of this study is to evaluate chemopreventive activities of the seaweeds Phaephyceae - Padina durvillaei (Dictyotaceae) - Rodhophyceae - Spyridia filamentosa (Spyridiaceae), Gracilaria vermiculophylla (Gracilariaceae) - and Chlorophyceae - Ulva expansa (Ulvaceae), Codium isabelae (Codiaceae), Rhizoclonium riparium (Cladophoraceae) and Caulerpa sertularioides (Caulerpaceae). Materials and methods Methanol, acetone and hexane seaweed extracts were assessed at 30 and 3 mg/mL on antioxidant capacity (DPPH and ABTS assays), 0.003-3.0 mg/plate on antimutagenic activity against AFB1 using Salmonella typhimurium TA98 and TA100 tester strains in Ames test, and 12.5 to 100 μg/mL on antiproliferative activity on Murine B-cell lymphoma. Phenols, flavonoids and pigments content were also assessed as antioxidant compounds. Results Extraction yield was higher in methanol than in acetone and hexane extracts (6.4, 2.7 and 1.4% dw). Antioxidant capacity was higher in brown and green than in red seaweed species, particularly in P. durvillaei extracted in acetone (EC50 value= 16.9 and 1.56 mg/mL for DPPH and ABTS). Flavonoids and chlorophylls were identified as mainly antioxidant components; particularly in hexane extracts, which were correlated with the antioxidant capacity. Highest mutagenesis inhibition (> 40%) occurred in R. riparium at the lowest concentration assayed (0.003 mg/plate), while highest antiproliferative inhibition (37 and 72% for 12.5 and 25 μg/mL) occurred in C. sertularioides. Discussion and conclusion Flavonoids and chlorophylls explained the chemopreventive activities assessed in S. filamentosa, R. riparium and C. sertularioides. These seaweeds have a high potential as a source of novel chemoprotectants.

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Screening of selected marine algae from the coastal Tamil Nadu, South India for antibacterial activity

Cited by 33 publications

References 41 publications

Antimicrobial Action of Compounds from Marine Seaweed

Antimicrobial Action of Compounds from Marine Seaweed

Antibacterial and antioxidant activities of differential solvent extractions from the green seaweed Ulva intestinalis

Antioxidant, antimutagenic and antiproliferative activities in selected seaweed species from Sinaloa, Mexico

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